V4 Internal Combustion Model Engine Plans

US $154

Hollansburg, Ohio, United States
Nov 7th

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These plans will guide you in building a powerful Howell V-Four, 4 Cycle Gas Engine, with a displacement of 1.95 Cu. In. (32cc). The engine's cylinders are positioned 90 degrees apart to ensure smooth running and reduced vibration. The bore of the cylinder is .875" and the piston stroke is .812", and the cylinder banks are not staggered to provide stability. The connecting rods of this engine are made robust with a knife and fork system. The oil pump is situated externally and controlled by an oil pressure adjuster and an oil pressure gauge port. Pressure lubrication to the rod ends is implemented through the drilled crankshaft. This engine is water-cooled with a unique magnetic drive water pump that has no seals that can leak, combined with an effective homemade radiator that operates at maximum efficiency due to the 5-curved blade fan blade shroud. Remarkably easy to make, the multi-segment built-up crankshaft and twin camshafts are specifically designed for this engine. The Hall Effect distributor is driven off the end of one of the camshafts and linked to the throttle arm for spark advance/retard based on the throttle setting. The throttle is a newly designed 2-jet system with an oiled foam air cleaner to ensure optimal performance. Initial test runs show an idle speed of around 1,000 RPM, which is expected to improve once the engine is fully broken-in. The top speed of the engine is above 6,500 RPM, which is impressive. Various bearings exist in this engine, including on the crankshaft, timing gears, camshaft, distributor, rocker arms, water pump, oil pump, and fan shaft. All external parts are sealed with "O" rings to prevent oil seepage from the engine. A crankcase vent/check valve is present to maintain negative crankcase pressure, alongside a dipstick for monitoring oil level and an easy-to-reach oil drain plug. This set of plans includes 65 laser printed CAD drawings and 5 construction notes, with a full set of features for the engine, except for the stainless steel exhaust pipes and manifolds. Metal bar stock is used for all plans projects, with no castings required. This is the most cost-effective approach, with metal usually available from metal salvage yards for around $2.00 per pound of aluminum, brass, and stainless steel. Although most model engines are designed V4 Internal Combustion Model Engine Plans